Prebiotic Sodas May Contain Less Fiber and More Sugar Than Advertised

New research shows that prebiotic sodas may contain higher sugar and lower fiber than claimed. Rapeepong Puttakumwong/Getty A new study found that prebiotic sodas may contain more sugar and less fiber than they claim. The findings show that a majority of prebiotic sodas contain more sugar than diet sodas and flavored sparkling water. Researchers also report that not all prebiotic sodas provide the same amount of fiber. Prebiotic sodas contain dietary fiber that may support gut health, but some of their benefits may be overstated. A new study reports that prebiotic sodas may contain more sugar and less fiber than manufacturers claim. The findings, presented at NUTRITION 2026 July 25–28 in Washington, D.C., show that prebiotic sodas may contain more calories and sugar than diet sodas and flavored sparkling water. The study has not yet been published in a peer-reviewed journal. “Because frequent intake of sugary drinks is associated with obesity, type 2 diabetes, and other chronic diseases, prebiotic sodas may appeal to consumers as an alternative,” said lead study author Carlos R. Soto Díaz, MPH, a PhD candidate at the University of North Carolina at Chapel Hill. “They a…